Saturday, April 10, 2021
How would the 2 transistor microphone preamplifiers sound if the feedback resistor is removed?
Without negative feedback distortion would be less abrupt, ie gradual distortion of more pleasing low order overtones.
For example removing or increasing the 2nd transistor collector resistor to emiiter of 1st transistor on the electronic kits mentoned on previous posts.
These simple class A (electrons flowing all the time) circuits are based on the Mullard book examples.
References: 1. Tubes vs Transistors, is there an audible difference - Russel O. Hamm - JAES. 2. Transistor Audio and Radio Circuits - Mullard
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